How truss bridge balsa wood ehow, Measure two pieces of 1/8-inch balsa wood for the base of the bridge. cut your pieces of balsa wood using a ruler and a sharp utility knife. score the wood with moderate pressure several times. do not try to cut balsa wood in a single cut, as too much pressure will crush the edges of the wood.. Balsa/basswood – garrett' bridges: resources , For this balsa wood bridge, i used a ‘k-truss’ design with seven vertical members and 6 ‘k-trusses’ per side. the k’s were the most challenging part of the build, because i had to calculate each ones length, and the approximate measure of the angle i had to cut into each one.. What bridge design holds weight? – garrett', I’m building a balsa bridge that needs to span 36″. it only needs to hold 25lbs centered. the criteria for winning is to hold 25lbs with the most efficiency. my initial thought was to make an arch super and sub structure that overlaps on the main chord, with warren or k webbing(can post a sketch if it helps)..
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